Plastic Greenhouse, economic greenhouse, commecial greenhouse. ModelCladding materialSpan(mm)Section(mm)Top height (mm)Snow Load ... -drip Film960040002500-35000.2KN/m20.5KN/m2 The frame works structure is consisting of main poles, truss, gutters and various ... system, shading system, cooling system, heaters, fans, etc, in the greenhouse to maintain a comfortable environment for plants according to the ...